303 Brit is one of the few cartridges I see on the shelves. Price has not changed. Keep in mind, this is not a popular or big selling cartridge in the USA. Thus, US ammo manufacturers run batches of it at certain times of the year only. The exception would be the imports IE; SBP & PPU. If I was a betting person, I would bet overseas ammo makers are making plenty of 223 ammo and it is heading our way.